BS EN 62321-7-1:2015 - Determination of certain substances in electrotechnical products. Determination of the presence of hexavalent chromium (Cr(VI)) in colorless and colored corrosion-protected coatings on metals by the colorimetric method

BS EN 62321-7-1:2015

Determination of certain substances in electrotechnical products. Determination of the presence of hexavalent chromium (Cr(VI)) in colorless and colored corrosion-protected coatings on metals by the colorimetric method

Status : Current   Published : January 2016

Format
PDF

Format
HARDCOPY



This part of IEC 62321 describes a boiling water extraction procedure intended to provide a qualitative determination of the presence of hexavalent chromium (Cr(VI)) in colourless and coloured corrosion-protection coatings on metallic samples.

Due to its highly reactive nature, the concentration of Cr(VI) in a corrosion-protection coating can change drastically with time and storage conditions. Since storage conditions prior to sample submission are not often known or provided with the samples, this procedure determines the presence of Cr(VI) based on the levels detected in the coatings at the time of testing. For testing of freshly coated samples, a minimum waiting period of 5 days (after the coating process) is necessary to ensure the coatings have stabilized. This waiting period allows potential post-process oxidation of Cr(III) to Cr(VI) to occur prior to testing.

The presence of Cr(VI) is determined by the mass of Cr(VI) per surface area of the coating, in µg/cm 2. This approach is preferred since corrosion-protection coating weights are often difficult to measure accurately after production. From a coating technology perspective, the industry as a whole has transitioned to either using the non-Cr(VI) based chemistries – where little to no Cr(VI) should be present – or using the traditional Cr(VI) based chemistries – where significant levels of Cr(VI) are present and can be detected reliably. Given this industry shift, the presence or absence of Cr(VI) is often sufficient for compliance testing purposes.

In this procedure, when Cr(VI) in a sample is detected below the 0,10 µg/cm 2 LOQ (limit of quantification), the sample is considered to be negative for Cr(VI). Since Cr(VI) may not be uniformly distributed in the coating even within the same sample batch, a “grey zone” between 0,10 µg/cm 2 and 0,13 µg/cm 2 has been established as “inconclusive” to reduce inconsistent results due to unavoidable coating variations. In this case, additional testing may be necessary to confirm the presence of Cr(VI). When Cr(VI) is detected above 0,13 µg/cm 2, the sample is considered to be positive for the presence of Cr(VI) in the coating layer.




Standard NumberBS EN 62321-7-1:2015
TitleDetermination of certain substances in electrotechnical products. Determination of the presence of hexavalent chromium (Cr(VI)) in colorless and colored corrosion-protected coatings on metals by the colorimetric method
StatusCurrent
Publication Date31 January 2016
Normative References(Required to achieve compliance to this standard)EN 62321-2, IEC 62321-1, EN ISO 3696, EN 62321-1, ISO 78-2, IEC 62321-2, ISO 3696
Informative References(Provided for Information)ISO 648, ASTM E1272-02, 111/320/INF, EN ISO 648, DIN EN 15205:2007, EN ISO 3613, EN 15205:2006, ISO 3613
ReplacesBS EN 62321:2009
International RelationshipsEN 62321-7-1:2015,IEC 62321-7-1:2015
Draft Superseded By11/30241787 DC
DescriptorsLead, Biphenyl, Cadmium, Chromium, Mercury, Chemical analysis and testing, Electronic equipment and components, Environmental engineering, Dangerous materials, Flame retardants, Electrical equipment, Electrical components, Determination of content
ICS13.020.01
43.040.10
Title in FrenchDétermination de certaines substances dans les produits électrotechniques. Chrome hexavalent. Présence de chrome hexavalent (Cr(VI)) dans les revêtements incolores et colorés de protection anticorrosion appliqués sur les métaux à l'aide de la méthode colorimétrique
Title in GermanVerfahren zur Bestimmung von bestimmten Substanzen in Produkten der Elektrotechnik. Bestimmung des Vorliegens von sechswertigem Chrom (Cr(VI)) in farblosen und farbigen Korrosionsschutzüberzügen auf Metallen durch das kolorimetrische Verfahren
CommitteeGEL/111
ISBN978 0 580 74417 4
PublisherBSI
FormatA4
DeliveryYes
Pages24
File Size1.375 MB
Price£182.00


 Your basket
Your basket is empty

Multi-user access to over 3,500 medical device standards, regulations, expert commentaries and other documents


Develop a PAS

Develop a fast-track standardization document in 9-12 months


BSOL

The faster, easier way to work with standards


Tracked Changes

Understand the changes made to a standard with our new Tracked Changes version